/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
 * @author Alexander Y. Kleymenov
 */

package org.apache.harmony.security.x509;

import org.apache.harmony.security.asn1.ASN1Choice;
import org.apache.harmony.security.asn1.ASN1GeneralizedTime;
import org.apache.harmony.security.asn1.ASN1Type;
import org.apache.harmony.security.asn1.ASN1UTCTime;

/**
 * Class represents the work with the following X.509 structure: (as specified
 * in RFC 3280 - Internet X.509 Public Key Infrastructure. Certificate and
 * Certificate Revocation List (CRL) Profile.
 * http://www.ietf.org/rfc/rfc3280.txt):
 * 
 * <pre>
 * Time ::= CHOICE {
 *       utcTime        UTCTime,
 *       generalTime    GeneralizedTime 
 * }
 * </pre>
 */
public class Time {

	private static final long JAN_01_2050 = 2524608000000L;

	public static final ASN1Choice ASN1 = new ASN1Choice(new ASN1Type[] {
			ASN1GeneralizedTime.getInstance(), ASN1UTCTime.getInstance() }) {

		@Override
		public int getIndex(java.lang.Object object) {
			// choose encoding method (see RFC 3280 p. 22)
			if (((java.util.Date) object).getTime() < JAN_01_2050) {
				return 1; // it is before 2050, so encode as UTCTime
			} else {
				return 0; // it is after 2050, encode as GeneralizedTime
			}
		}

		@Override
		public Object getObjectToEncode(Object object) {
			return object;
		}
	};
}
